5. Anything to the power of zero (except zero) has the same value.

7. You can make the exponent positive by putting it in the denominator.

15. Only the `y` has a negative exponent.

20. Each negative exponent can be made positive by crossing the fraction bar.

27. This is `p`^{6} × `p`^{6} × `p`^{6} × `p`^{6}.

31. `x` is `x`^{1}.

32. There are a lot of ways you could start this problem, such as simplifying the numerator.

37. -5 to the third power is -125.

38. `x`^{4} will be in the denominator, and so will the value of 4^{4}.

39. The negative exponent flips the fraction.

40. Negative `t` times negative `t` is positive `t`^{2}.

70. The √ symbol means the positive square root.

72. √(`a`/`b`) is the same as √`a` / √`b`.